Book cover



Aug. lo, 1937. P, o, UNGER 2,089,313

BOOK COVER Filed May 25, 1934 ATTORNEY.

Patented Aug. 10, 1937 PATENT OFFICE BOOK COVER Paul O. Unger, Glen Ellyn, Ill., assignor to Wilson-Jones Company, tion of Massachusetts Chicago, Ill., a corpora- Application May 25, 1934, Serial No. 727,381

2 Claims.

This invention relates to covers for books, and particularly to covers for heavy duty books that must be built quite substantially and are necessarily possessed of relatively great weight.

It is an object of this invention to provide a sturdy reinforced cover of comparatively light Weight that will stand up under extremely hard usage- It is a further object of this invention to provide a cover of the class described with a resilient protective edge. It is a further object of this invention to provide a book cover that will not warp under any conditions. Other objects of this invention will become apparent upon reading the following description taken in conjunction with the accompanying drawing, in which- Figure 1 is a top plan View of a book cover embodying my invention, with parts broken away to facilitate illustration of the structure;

Figure 2 is a cross section taken along the line II-II of Figure 1; and

Figure 3 is an enlarged cross section taken along the line III- III of Figure 1.

In the drawing, the reference numeral 2 indicates a plate formed of aluminum or some strong light alloy such as duralumin. The plate 2 is hinged at one edge to a back plate 3. The hinge tube is formed by curling complementary extensions 4 and 5 on the plate 2 and the back plate 3. A pintle 6 is driven through the hinge tube to connect the two plates. It will be understood that the back plate 3 may be covered with any suitable material to enhance the appearance of the book.

The plate 2 is reinforced along each edge except the hinge edge. The other three edges of the plate are bent down upon the plate, as indicated at 'I. If desired, the edge reinforcement may be formed by beading the edges of the metal plate instead of bending them flat. The outer corners of the plate 2 are cut away, as indicated by the line 8, Figure 1, to leave an extension 9 which is drawn out of the plane of the plate and is then bent inwardly to provide an unbroken doubled edge for the outer corners of the cover. The bending of the drawn portion of the corner gives the corner reinforcement a corrugated appearance, as shown in Figure 3. The corrugations are preferably flattened somewhat to reduce the height of the corner structure. 'Ihe integral 50 corner construction adds materially to the strength of the cover.

A layer I0 of cork, cork composition, or other resilient material of the same thickness as the plate 2 is positioned on the plate with its edges abutting the edges of the turned over portions l, Two layers II and I2, of the same material as the layer I0, are positioned on opposite sides of the plate 2. The layers I0, II and I2 may be adhered to the plate 2 and to each other in any suitable manner. The edges of the layers II and I2 project slightly beyond the edges of the plate 2, as indicated at I3 and I4, respectively, to provide a resilient protective cushion along the outer edges of the cover. A covering I5, of leather, fabric or similar material, encloses the layers IIJ and I2, and the outer edges of the layer II. A lining I6 of paper, imitation leather or similar material is secured to the exposed surface of the layer II and overlaps the edges of the covering I5. The edges of the layers II and I2 are preferably beveled at their outer edges, as indicated at I'I, and the layer I2 also at its inner edge, as indicated at I8, to give the bound cover a pleasing appearance.

The structure described is of particular advantage in connection with books that have heretofore been objectionable because of their excessive weight, because of the fact that the reinforced plate increases the strength of the cover so that it will stand up better under hard usage and the total weight of the book covers is materially reduced.

While I have described a preferred embodiment of my invention in considerable detail, it will be understood that the description thereof is illustrative rather than restrictive, as many details may be modiiied or changed without departing from the spirit or scope of my invention. Accordingly, I do not desire to be restricted to the exact construction described, except as limited by the appended claims.

I claim:

1. In a book cover, a metal plate having extensions along one edge curled to form portions of a hinge tube, the other edges of said plate being bent over upon said plate to form a reinforcement therefor, and a layer of resilient protective material positioned on each side of said plate, said resilient protective material projecting beyond the outer edges of said metal plate.

2. In a book cover, a metal plate having its edges bent to present smooth rounded edge surfaces, a layer of resilient material abutting said bent edge portions to equalize the thickness of the plate, and a pair of protective layers of resilient material projecting beyond the edges of said metal plate.

PAUL O. UNGER. 

